Ghost nets, or ghost gear, are abandoned or lost fishing equipment. They float through the ocean, trapping and killing wildlife, snagging on boats, and even threatening divers.
One local scuba diver saw the problem and decided to take matters into his own hands.
Harry Chan, a self-proclaimed “ghost net hunter,” has spent the last decade hauling abandoned fishing nets out of the ocean. The 68-year-old retired businessman says he is on a mission to clean up Hong Kong’s surrounding waters and coastline.
“If we’re not going to take care of the environment and the ocean, we aren’t going to get another one,” says Chan.
What is ghost gear?
This is a huge problem for marine life as well as people, says Laurence McCook, oceans director for WWF Hong Kong.
Hunting for ghost nets
Once Chan locates a net, removing it can take anywhere from three to eight hours, and is dangerous and grueling work. But Chan, who has been diving since 1987 with over 3,000 dives to date, is obsessively passionate — and his brushes with death in pursuit of his goal have not deterred him.
“A couple of times, I almost got killed, being tangled,” he says. “Luckily, I was able to be freed by my buddies.”
Over the years, Chan has built a small team of rotating volunteers who help him on his mission to clean up Hong Kong’s waters. Kitted out in scuba diving gear, the team will go out on a boat in search of stray ghost nets.
When they find one — which can be tricky with Hong Kong’s poor water visibility — they use a knife or scissors to free marine life trapped in it or untangle it from rocks, coral or the seabed where it may be caught.
Depending on the size and weight of the net and how deep it is, a small floating device can help lift the net to the surface. Typically, Chan goes on these dives twice a month, as well as organizing beach and shoreline cleanups.
Over the years, Chan estimates he has collected more than 80 metric tons of ghost gear by hand with his volunteer group, and says he’s determined to continue hunting this “silent killer.”
“Being a diver, there’s so much we can do to protect and save the ocean,” he says.
‘Ghost Gear Detective’
While “local heroes” like Chan are doing great work collecting ghost nets, the potential dangers to even the most experienced divers cannot be overstated, says McCook of WWF Hong Kong.
“A net is designed to catch things underwater, and it’s very good at doing that,” he says. “It’s remarkably easy to get tangled, and at the end of the day, we’re underwater — we have a limited air supply.”
That’s why WWF Hong Kong has developed a “Ghost Gear Detective” program.
The citizen scientist initiative invites recreational scuba divers and boaters to record the location of ghost gear on a waterproof slate using a portable, floating GPS device to identify the coordinates. This information is reported via an app once they’re back on dry land.
Since the program’s launch in 2019, WWF Hong Kong says 244 pieces of ghost gear have been removed, based on 225 reports — amounting to nearly 600 pounds of equipment.
“The value of collecting the data is not only about removing it, but that database then puts the government and ourselves in a position to understand the magnitude and nature of the problem — which is critical to figuring out solutions,” says McCook.
Tagging and tracking
While cleaning up this ghost gear is essential, stopping fishing gear from ending up in the ocean in the first place is key.
Creating incentives for fisheries and fishermen to keep their nets well maintained and properly recycle them could help “prevent deliberate and accidental loss of nets,” says McCook.
Ghost nets are also often “strongly associated with illegal fishing,” he adds, so governments have to ensure that marine police and conservation bodies have “the resources and the means to be able to really enforce the legislation actively and responsibly.”
Chan hopes improved government policies will remove the “root cause” for future generations. And though the size of the problem can sometimes be daunting, he says as long as there are ghost nets in the ocean, he’ll keep diving.
“I’m in my 60s, I’ve got all the time I want to do whatever I want to do — and being a diver, I think it’s time for me to really contribute back to the community,” says Chan. “Age is only a figure. There’s so much we can do, no matter how old you are.”
Meet Hong Kong’s ‘ghost net hunter’ who is saving the city’s sea life